There's a #RetroComputing bit of silliness that I've been poking away at with little success for the past month-ish.
You might remember the ThunderScan, that lets you turn the ImageWriter dot matrix printer into a scanner? Well, @keelan gave me one to play with while I was in Canada! He documented it here: https://beefchicken.com/retro/thunderscan/
Anyway, it's old and uses usually-ignored-and-often-not-even-plumbed-in-anymore serial cable pins, so it's been a bit of a brouhaha to get it set up.
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